Furnace.



M. W. SLWALL. f

PURNAGB'; APPLICATION FILED OUT; 1, 11908.

INVENTUR WITNESSES:

ATmRNEY s M. W. SEWALL.

'PURNA'GR APPLICATION FILED 00T.1, 1908.

Patente-ad Nov. 30, 1909.

4 SHEETS-'SHEET 2.

WWWWWWWWWW ...vl NToR WITNESSES BY Wwf ATTURNEYS.

M. W. SEWALL.

FURNAGE.

,APPLIOATION FILED 00T. 1, 1908.

Patented Nov. 30, 1909.

SHEETS-SHEET 3.

INVENTOR 36M my WITNESSES:

ATTORNEYS UNITED STATES PATENT OFFICE.

l rtNo'rT W. sEWALi., or EosELLE, NEW JERSEY, 'AssreNoE 'ro THE EAEoocK a WIL- lcoxv ooMrANY, or BAYONNE, NEW ljJEnsEv, A 'CORPORATION or NEW JERSEY.

FURNAQE.

Specification of Letters Patent.

To all whom 'it my'concem:

l3e'1tknown that I, Minor'r WV. SEWALL, a citizen of the United States, and a resident of Roselle,in the county of Union and State l of New Jersey, have invented a certain new and useful Improvement in Furnaces, of which the following is a specication. I

This invention relates to improvements in" furnaces and particularly steamboiler furnaces.

The usual method `of setting certain types of boilers, likewater-tube, 4is to place two boilers in one brick setting, allowing apassageway between the adjacent' settings for access to one side of each boiler for purposes of cleaning. Very vlarge boilers .are frequently set singly.

In the present' 'nstance I provide a struc- 'ture wherein I increase the grate surface .without increasing the'floor space occupied by .the plant. Y j 'i This invention utilizesv the passageway between a plurality of boilers for grate sur- -face and at the saine time conserves the space between the boilers for dusting the tubes and for access to' the internal chambers.

l'The invention consists in the construction, combination and arrangement of parts set forth-in andfalling within the scope of the appended claims.

The Afliecompanying drawings show one manner of carrying out my invention with a .plurality of boilers, also with boiler set singly and as adapted to boilers for marine service.

vFigure l, Sheet 1, is a longitudinal vertical section on the line b, b, Fig. 2, and Fig. 2 a transverse vertical section through the additionalfurnace space on the line Fig-1, showing vthe adjacent boiler wall on 'i each side together witha portion of each boiler. l i

The furnace vshown in Fig. 1 is -arranged for -a chain grate as represented' in dotted lines, the iron supports under the walls al: lowing ample room for' the wheels carrying the stoker frame. a

, In Sheet 2, Figs, 3 and 4 are views of like character shown in Sheet .1, Fig. 3 showing a whole length continued line of boilers having the furnaces of adjacent boilers extended to a party wall, 'and Fig. 4 showing a furnace extending the of the boiler and tired from opsite ends. The structures illustrated on Sheets 1 and 9. .are designed for land boilers.

In Sheet 3, Figs. 5 and-6 show respectively a cross sectional view and side elevation of a structure embodying the invention and adapted to marine service.

Fig. 7, Sheet 4, is; a front view of the arrangement vof a battery of boilers, with eX- tended furnaces and passageways between, and corresponding to the construction shown in Figs. 1 and 2.

In all the figures, except Fig. 7, the different views `,are shown on similar lines indicated by the-lines b, b, and m, and the letters and numerals denoting the correspondf ing or similar parts of all the several gures are identified by the saine numeral or letter.

In Figs. 2 and 5, A and C represent the furnace chambers of adjacent boilers having a passageway between them, and B the intermediate furnace chamber, having its roof composed of water tubes D which are expanded into-transverse water boxes E at the Patented Nov. 30, 1909.

opposite ends and arranged parallel with the inclined group of water tubes which form the mainsteain generating part. The spaces be tween the tubes D are filled with special bricks F and over these bricks and tubes a floor Gr is laid preferably of heat insulating material that will be sufficiently cool towalk upon, the space above this Hoor being left clear.

In Fig. l I have shown 4two sets of dusting doors l? and Q, the latter having sight openings or holes which may be closed by a swinging or sliding gate to permit of the insertion of a pipe for dusting the tubes, and the former an ordinary hinged door. These doo-rs are in the side wall of the boiler above the roof of the sup lemental furnace B and readily accessible or the purpose of cleaning the boiler tubes of dust and soot. This cleaning is accomplished `by means of a steam jet carried by a pipe four or five feetin length with a special form of nozzle, and the workman, instead of using a ladder to reach -the doors as heretofore, works along the pasroof of tubesv and re bricks extends from this -Inay' be placed with boilers centrally above theni, having passage ways, as at D', under-j the centerof whichstands the party wall between the two furnaces'. lnl thisA construel() the center -wall `navel-ard '-each `boiler far enough to cover not` only :the portion under the passage away, but. it -extends.` entirely under the side walls of the boiler itself. -By nieanS, a continuous', line of' furnaces tion each boiler' has asingle; furnace'equal to the original furnace width plus the' additional aniountrgaiiied on 'eachiside ofV the boilerby extending to the center of the ,passage way, asalready mentioned. The -boiler sidewalls may be carried above the f'urnace roof and 'clear of it on reinforced'concretef beams, which are supported on the end` walls ofthe flooile'rs by castings E and F. These castings'also partially support the end boxes E ofthe lwateretube roof. The reinforced concretebeains are lined on the furnace side with lire brick, .which is tied into the beams, sufficiently lto carry itswei'ght..

A clearl space is provid d between the furnace roof and the under Side ofthe concrete `or other 'beani to insure the integrity ofthe roof itself. lAn inlet and-'outlet are indicated to sli wfth'at a water circulation will be provided for the .water-tuberoof. f

In Fig. 4r I have'shown 'the-dusting doors P and Q similar to the doors of Fig. l, said doors beingl accessible tothe workman as hepasses along-the roof of tlielateral`exten-A sions .of the two furnaces A and B.

extension adapted tof-a boiler haying its furnace in'closed by water boxes at the' sides tei'niediate furnace and A an the furnaces of the adj acent boilers.A rEhe roof of the respective furnaces is' formed by tubes ratherthan brick vi/alle, Bre resents the in- C-a portion of D and bricks vF with' insulation material G', asbefore described. The water box side ofthe,

furnace'A is indicated bygboxes H andthe side of'furnace. B by boxes H. vBoxes vK forni the -side of furnace 'C I @The side boxes `of the furnaces 'are connected at either' end by nipples to vertical boxes," which" are nippled at the upper ends :to "the-outside' section of the boiler, thus' intrpducing the water lcontained in the, 'side boxes directly into the circulation of the boiler itself.

' ln this construction, in order to allow a' passageof the gases from furnace Bte/fui,-

nace C, the upperside box is o`ut, lea'v.v ling the longitudinal passage L in its place the full length of the furnace throughxwhich gas ina'y pass from furnace B to furnace C. l'llie boxes K formingthe side of furnace B adjacent to furnace C will be formedl several boxes in height connected to vertical b oxesM and M (Fig. 6) at the. end

and of the saine general-forni as are usuallyv used foi' the furnace side and boxes.

The boxes H will besupplied through box is nippled to the' froi'itc'orner box o f furnace Bat H and also at its .oppo

site endto the. upper end ofthe front corner' boxat L, into which nippled. As shown in Fig,`.5,-the' upper box E is nippled tothecorner b'ox M towhich the side boxes H are' also i'iippled. This up er box E is-also ni'ppled at its opposite en at E. to the side of the vertical corner box L the boxes K are alsd `shown in dotted outline. The roof tubes D are alsoI expanded into the boxes 'E and forni the support for the bricks F and other portion of the furnace roof.

j The advantages to lie-derived from this arrangement are as .follows z--lst-In an .existing plant where grate surface is insuiiicient, the extensionV furnaces may be introlduced and the power of the plant increased thereby. increased grate surface corresponding heat- 2nd-In a new plant with the -i-ng surface may be introduced 'in excess of thatwhich would otherwise he advisable. Theresult being that more .boiler power' can be placed on a given ground area, and a steain plant produced' having a greater con# centration of power than has heretofore been possible. Having vthus described my invention what I claim and desire to secure by Letters Patvent is l. A plurality of boilers spaced apart forming passageways therebetween, furnaces for said boilers, the grate sulface'of said furnaces extending over the floor space between contiguous boilers, and ineans for separating contiguous furnaces.

2. A plurality of boilers v spaced apart foriiiing passagei'vays therebetween, furnaces for said boilers, the grate surface of said 'furnaces extending over the ioor space be tween contiguous boilers and the iioors of said passageways. constituting portions of` the furnaceroofs, and nieans for separating contiguous furnaces.

8. A plurality of boilers spaced apart forming passageways therebetween,-furnaces for said boilers, thel grate surface of said 4furnaces,extending over'the floor s ace be- .tweenfcontiguous boilers and the Iioors of said passageway's.I constituting portions of the furnace roofs, dust-ing doors in the side above said roof. G. A plurality of boilers spaced apart lormingi' passageways therebetween, furnaces or sa boilers, the. grate surface of said furnaces entending over the floor space -between contiguousbollers, thel iioors jof. said passageway/s constituting portions of the `:furnace roofs said roofs'belng composed of water tubes having suitable connections to the boiler circulation, 4and. means for separating contiguous furnaces.

7. A plurality of boilers. spaced apart forming assageways therebetween, furnacesforsai 4 Oilers, each furnace having a grate 4e'xte'ndir'lg laterally of the corresponding boiler over the floor space between contigu ous boilers, and means for separating contiguous furnaces.

8.*A"plurality of boilers spaced apart, a,

I furnace located between said boilers pro-v vided with `a roof, and a passageway between said' boilers above said roof.

. Witnesses:

F9. plurality of boilers spaced apart,

a furnace for each of said boilers, a supple- -mental furnacel located between .certain of tween contiguous boilers, and walls between contiguous furnaces, said walls being coinposed ofv water boxes having suitable connections to they boiler circulation.

v In testimony whereof I have signed my name to 'this speciication in the presence of'two subscribing witnesses.

r MINOTT W. SEWALL.

R. B. CAVANAGH, W. A. PAULING. 

